如何通过不同的扬声器并行播放2段音频？ - 蟒蛇

Question

我有两段音频：（1）15个心跳片段和（2）15个频率噪声。频率噪声只有 1 秒，持续时间比心跳剪辑（动态生成，长度可变）短。

我能够通过不同的扬声器成功播放这两首曲子，但只能连续播放（一次一个），而不是并行（一起）。我通过

sounddevice

这样做如下：

import sounddevice as sd
import sound file as sf

for i, clip in enumerate(user_heartbeats):
      clip.export("temp.wav", format="wav")
      audio_data, sample_rate = sf.read("temp.wav", dtype='float32')
      sd.play(audio_data, sample_rate, device=heartbeat_speaker_id)
      sd.wait()

      t = np.linspace(0.0, freq_duration_sec, int(freq_duration_sec * sampling_freq), endpoint=False)
      waveform = (volume) * np.sin(2.0 * np.pi * frequencies_to_play[i] * t)
      sd.play(waveform, sampling_freq, device=frequency_speaker_id)
      sd.wait()

我查看了

threading

库可能同时播放，但我无法获得预期的结果：

def play_audio_pairing(audio, delay, device):
    # load heartbeat sound
    audio_data, sample_rate = sf.read(audio, dtype='float32')
    
    if delay > 0:
        padding = np.zeros((int(delay * sample_rate), audio_data.shape[1]))
        audio_data = np.concatenate((padding, audio_data), axis=0)
    
    # Play audio file on the specified sound device
    sd.play(audio_data, sample_rate, device=device)
    sd.wait()

max_audio_duration = max([sf.info(file).duration for file in heartbeat_sounds + frequencies_to_play])

threads = []
for i in range(len(heartbeat_sounds)):
      heartbeat_sound = heartbeat_sounds[i]
      frequency_noise = frequencies_to_play[i % len(frequencies_to_play)]
      heartbeat_delay = max_audio_duration - sf.info(heartbeat_sound).duration
      frequency_delay = max_audio_duration - sf.info(frequency_noise).duration
      thread = threading.Thread(target=play_audio_pairing, args=(heartbeat_sound, heartbeat_delay - frequency_delay, heartbeat_speaker_id))
      threads.append(thread)
      thread.start()
      thread = threading.Thread(target=play_audio_pairing, args=(frequency_noise, 0, frequency_speaker_id))
      threads.append(thread)
      thread.start()

for thread in threads:
      thread.join()

这只播放前 3 个频率，我听不到心跳声。

关于如何合并这些以便每个频率噪声开始并在不同的扬声器中播放其相应的心跳声的任何帮助都将非常有帮助。